\documentclass[UTF8]{ctexart}
\title{你好.world}
\author{Li}
\date{\today}
\begin{document}
\maketitle
\section{你好中国}
中国在East Aisa.
\subsection{Hello BeiJing}
北京是capital of China.
\subsection{Hello Dongcheng District}
\subparagraph{Tian'anmen Square}
is the center of BeiJing
\subparagraph{Chairman Mao}
is in the center of 天安门广场.
\subsection{hello 山东}
\paragraph{山东大学} is one of the best university in 山东. 
\end{document}
